78909908 has 36 divisors (see below), whose sum is σ = 173478816. Its totient is φ = 30742800.

The previous prime is 78909893. The next prime is 78909949. The reversal of 78909908 is 80990987.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8258 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (4818856).

Almost surely, 2^78909908 is an apocalyptic number.

It is an amenable number.

78909908 is an abundant number, since it is smaller than the sum of its proper divisors (94568908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78909908 is a wasteful number, since it uses less digits than its factorization.

78909908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23324 (or 23311 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 78909908 is about 8883.1249006192. The cubic root of 78909908 is about 428.9208707879.

The spelling of 78909908 in words is "seventy-eight million, nine hundred nine thousand, nine hundred eight".